<!DOCTYPE html>
<html>
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>左中右</title>
	<link rel="stylesheet" href="../css/bootstrap.css">
</head>
<body>
	<div class="container">
		<div class="btn-group btn-group-justified">
			<div class="btn-group">
				<button class="btn btn-default">left</button>
			</div>
			<div class="btn-group">
				<button class="btn btn-default">center</button>
			</div>
			<div class="btn-group">
				<button class="btn btn-default">right</button>
			</div>
		</div>
	</div>
	<script src="../js/jquery-3.4.1.js" type="text/javascript"></script>
	<script src="../js/bootstrap.js"></script>
</body>
</html>